Differential hypoxemia during venoarterial extracorporeal membrane oxygenation

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Abstract

Venoarterial extracorporeal membrane oxygenation, indicated for severe cardio-respiratory failure, may result in anatomic regional differences in oxygen saturation. This depends on cannulation, hemodynamic state, and severity of respiratory failure. Differential hypoxemia, often discrete, may cause clinical problems in peripheral femoro-femoral venoarterial extracorporeal membrane oxygenation, when the upper body is perfused with low saturated blood from the heart and the lower body with well-oxygenated extracorporeal membrane oxygenation blood. The key is to diagnose and manage fulminant differential hypoxemia, that is, a state that may develop where the upper body is deprived of oxygen. We summarize physiology, assessment of diagnosis, and management of fulminant differential hypoxemia during venoarterial extracorporeal membrane oxygenation. A possible solution is implantation of an additional jugular venous return cannula. In this article, we propose an even better solution, to drain the venous blood from the superior vena cava. Drainage from the superior vena cava provides superiority to venovenoarterial configuration in terms of physiological rationale, efficiency, safety, and simplicity in clinical circuit design.

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Falk, L., Sallisalmi, M., Lindholm, J. A., Lindfors, M., Frenckner, B., Broomé, M., & Broman, L. M. (2019). Differential hypoxemia during venoarterial extracorporeal membrane oxygenation. Perfusion (United Kingdom), 34(1_suppl), 22–29. https://doi.org/10.1177/0267659119830513

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